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Finding the Fourth Proportional to 674,394, 930,690.45 and 387,913.74

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Solution

The fourth proportional to 674,394, 930,690.45 and 387,913.74 is: 535,336.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,394 : 930,690.45 = 387,913.74 : x
  2. Step 2: Convert to fraction form
    674,394/930,690.45 = 387,913.74/x
  3. Step 3: Cross multiply
    674,394x = 930,690.45 × 387,913.74
  4. Step 4: Simplify right side
    674,394x = 361,027,613,241.78
  5. Step 5: Solve for x
    x = 361,027,613,241.78/674,394
  6. Step 6: Final answer
    x = 535,336.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.